Lead Time Scheduling - Is there Any Field in Routing or Sum of Operations?

PP members:

I have been looking into Basic Scheduling & Lead Time Scheduling

Basic Scheduling is basically used to calcuate Basic Start & Finish dates for the Planned order ( without considering capacity reqts) and it can be maintained in MRP 2 view ( Inhouse Prod Time, GR processing Time & SMK)

While, Lead Time Scheduling is used to calculate Production Start & Finish Dates ( i.e. Scheduled Start & Finish Dates) for the production orders ( considering capacity requirements). utilizing the <b>data</b> <b>from routings</b>

Now, what <b>data of the routing</b> is it exactly being used to <b>calculate Lead Time Scheduling</b>

Also, I was looking for <b>Lead Time Scheduling Field</b> is Routings and W/c's but I am not able to find the respective

Any inputs into the above

Thanks

Suren R